Nasal Cavity & Nasopharynx Flashcards
what bones make up the nasal cavity?
- nasal bones
- maxilla (frontal & palatine processes)
- frontal (nasal spine)
- ethmoid (cribriform plate)
- palatine (horizontal plate)
- vomer
what forms the roof of the nasal cavity?
- cribriform plate of ethmoid
- body of sphenoid
what forms the floor of the nasal cavity?
hard palate
what forms the medial wall of the nasal cavity?
nasal septum
what forms the lateral wall of the nasal cavity?
nasal conchae
which nasal conchae are part of the ethmoid bone?
superior & middle
(inferior is its own structure/bone)
name the 3 types of nasal cartilages
- 2 lateral
- 2 alar
- 1 septal
the sphenoethmoidal recess is the opening for the ____
sphenoidal sinus
location of ethmoidal bulla
middle nasal meatus
the semilumar hiatus is the location of the opening for the ____ & ____ sinuses, and is located in the ____
- frontal & maxillary
- middle nasal meatus
the inferior nasal meatus contains the opening for the ____
nasolacrimal duct
the superior nasal meatus contains the opening for the ____
posterior ethmoidal sinuses
name the arteries of the nasal cavity
- anterior & posterior ethmoidal
- sphenopalatine
- greater palatine
- superior labial
- lateral nasal
anterior and posterior ethmoidal arteries originate from the ____
ophthalmic a
superior labial & lateral nasal arteries originate from the ____
facial a
the pterygoid plexus of veins travels with the…
maxillary a branches
veins travelling with the ophthalmic artery branches communicate with the ____
cavernous sinuses
innervation of anterosuperior region of nasal cavity
ophthalmic (V1):
- anterior & posterior ethmoidal nn (branches of nasociliary n)
innervation of posteroinferior region of nasal cavity
maxillary (V2):
- nasopalatine nn
- greater palatine nn
the nasal cavity is continuous posteriorly with the ____
nasopharynx
location and contents of pterygopalatine fossa
- pyramidal space inferior to orbit & medial to infratemporal fossa
- contains third (terminal) part of maxillary a and n (V2)
the third part of the maxillary artery is called the ____
pterygo-palatine part of maxillary a
describe the path of the pterygo-palatine part of the maxillary artery
passes through infratemporal fossa into pterygopalatine fossa via pterygomaxillary fissure
the pterygopalatine part of the maxillary artery gives off what 2 branches?
sphenopalatine a
descending palatine a
the descending palatine artery gives off what 2 branches?
greater & lesser palatine a
the maxillary nerve enters through ____
foramen rotundum
the maxillary nerve gives off the ____ in the pterygopalatine fossa
zygomatic n
the zygomatic nerve divides into what 2 nerves?
zygomaticotemporal
zygomaticofacial
function of zygomaticotemporal nerve
conveys postganglionic PSNS fibers to the lacrimal gland
the maxillary nerve suspends the ____
pterygopalatine (sphenopalatine) ganglion
the maxillary nerve leaves through the ____ and continues as the _____ nerve
inferior orbital fissure
infraorbital n
the pterygopalatine ganglion receives what nerve?
nerve of the pterygoid canal (vidian n)
what forms the nerve of the pterygoid canal (vidian n)?
- greater petrosal n
- deep petrosal n
what fibers does greater petrosal nerve carry?
preganglionic PSNS fibers from CN VII
what fibers does deep petrosal nerve carry?
postganglionic SNS fibers from internal carotid plexus
fibers from the pterygopalatine ganglion provide sensory to the…
nasal cavity
palate
superior pharynx
fibers from the pterygopalatine ganglion provides PSNS & SNS fibers to the…
lacrimal, nasal, palatine & pharyngeal glands & mucosa
name the functions of the pterygopalatine ganglion
- sensory
- secretomotor PSNS
- vasoconstrictive SNS
